20009120

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1583}}^1$

素因数の和:1677

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 27891040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1580, 1583, 2528, 3160, 3166, 6320, 6332, 7915, 12640, 12664, 15830, 25328, 31660, 50656, 63320, 125057, 126640, 250114, 253280, 500228, 625285, 1000456, 1250570, 2000912, 2501140, 4001824, 5002280, 10004560, 20009120]

約数ペア:

[(1, 20009120), (2, 10004560), (4, 5002280), (5, 4001824), (8, 2501140), (10, 2000912), (16, 1250570), (20, 1000456), (32, 625285), (40, 500228), (79, 253280), (80, 250114), (158, 126640), (160, 125057), (316, 63320), (395, 50656), (632, 31660), (790, 25328), (1264, 15830), (1580, 12664), (1583, 12640), (2528, 7915), (3160, 6332), (3166, 6320)]